public function endMovie()
 {
     println("Shutting movie theater down...");
     $this->popper->off();
     $this->lights->on();
     $this->screen->up();
     $this->projector->off();
     $this->amp->off();
     $this->dvd->stop();
     $this->dvd->eject();
     $this->dvd->off();
 }